Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
180067lightly pollutedexcellent41excellent
170064lightly pollutedexcellent41excellent
160057goodexcellent31excellent
150042goodexcellent31excellent
140040goodexcellent31excellent
130037goodexcellent11excellent
120042goodexcellent11excellent
110034goodexcellent11excellent
100038goodexcellent21excellent
090030goodexcellent21excellent
080033goodexcellent11excellent
070031goodexcellent11excellent
060024goodexcellent11excellent
050024goodexcellent11excellent
040023goodexcellent11excellent
030023goodexcellent11excellent
020021goodexcellent11excellent
010027goodexcellent11excellent
000025goodexcellent21excellent
230033goodexcellent21excellent
220032goodexcellent31excellent
210030goodexcellent41excellent
200033goodexcellent41excellent
190025goodexcellent31excellent